《C程序设计（第三版）》习题（编程题）解答

《C程序设计（第三版）》习题（编程题）解答

1.5

#include void main ( )

{ printf (\ printf(\ Very Good!\\n\\n\

printf (\} 1.6

include void main()

{int a,b,c,max;

printf(\ scanf(\ max=a; if (max

max=c;

printf(\}

3.7

#include

void main()

{char c1='C',c2='h',c3='i',c4='n',c5='a'; c1=c1+4; c2=c2+4; c3=c3+4; c4=c4+4; c5=c5+4;

printf(\}

4.7

#include void main() {int a,b;

float x,y,z; char c1,c2;

scanf(\,&z);

1

printf(\,z); } 4.8

#include void main () {float h,r,l,s,sq,vq,vz;

float pi=3.141526;

printf(\请输入圆半径r，圆柱高h∶\

scanf(\ //要求输入圆半径r和圆柱高h l=2*pi*r; //计算圆周长l s=r*r*pi; //计算圆面积s sq=4*pi*r*r; //计算圆球表面积sq vq=3.0/4.0*pi*r*r*r; //计算圆球体积vq vz=pi*r*r*h; //计算圆柱体积vz printf(\圆周长为: l=%6.2f\\n\ printf(\圆面积为: s=%6.2f\\n\ printf(\圆球表面积为: sq=%6.2f\\n\ printf(\圆球体积为: v=%6.2f\\n\ printf(\圆柱体积为: vz=%6.2f\\n\ }

4.9

#include void main()

{float c,f;

printf(\请输入一个华氏温度:\

scanf(\

c=(5.0/9.0)*(f-32); /*注意5和9要用实型表示,否则5/9值为0*/ printf(\摄氏温度为:%5.2f\\n\}

4.10

#include void main() {

char c1,c2;

printf(\请输入两个字符c1,c2:\c1=getchar();

c2=getchar();

printf(\用putchar语句输出结果为:\putchar(c1); putchar(c2); printf(\

2

printf(\用printf语句输出结果为:\printf(\}

1) #include void main()

{

int c1,c2; /*整型定义*/

printf(\请输入两个整数c1,c2:\ scanf(\ printf(\按字符输入结果:\\n\

printf(\

printf(\按ASCII码输入出结果为:\\n\ printf(\}

2) #include void main()

{

char c1,c2; /*定义字符型变量*/ int i1,i2; /*定义整型变量*/ printf(\请输入两个整数c1,c2:\ scanf(\

i1=c1; /*赋值给整型变量*/ i2=c2;

printf(\按字符输入结果:\\n\ printf(\

printf(\按整数输入出结果:\\n\ printf(\}

3) #include void main()

{

char c1,c2; /*定义为字符型*/ int i1,i2; /*定义为整型*/ printf(\请输入两个整数i1,i2:\

scanf(\

c1=i1; /*将整数赋值给字符变量*/ c2=i2;

printf(\按字符输入结果:\\n\ printf(\

printf(\按整数输入出结果:\\n\ printf(\}

3

5.4

方法一： #include void main() {

int a,b,c;

printf(\请输入三个整数:\ scanf(\ if (a

printf(\ else

printf(\ else if (a

printf(\ else

printf(\}

方法二： #include void main()

{ int a,b,c,temp,max;

printf(\请输入三个整数:\

scanf(\

temp=(a>b)?a:b; /*将a和b中的大者存入temp中*/ max=(temp>c)?temp:c; /*将a和b中的大者与c比较,取最大者*/ printf(\三个整数的最大数是%d\\n\} 5.5

#include void main() { int x,y;

printf(\输入x:\

scanf(\

if(x<1) /* x<1 */ { y=x;

printf(\ y=x=%d\\n\ }

else if(x<10) /* 1=

{ y=2*x-1;

printf(\ y=2*x-1=%d\\n\}

else /* x>=10 */

4

} 5.6

{ y=3*x-11;

printf(\ y=3*x-11=%d\\n\}

#include void main() { float score;

char grade;

printf(\请输入学生成绩:\ scanf(\

while (score>100||score<0) {printf(\输入有误,请重输\

scanf(\}

switch((int)(score/10)) {case 10: case 9: grade='A';break;

case 8: grade='B';break; case 7: grade='C';break; case 6: grade='D';break; case 5: case 4: case 3: case 2: case 1:

case 0: grade='E'; }

printf(\成绩是 %5.1f,相应的等级是%c.\\n \}

5.7

#include #include void main() {

long int num;

int indiv,ten,hundred,thousand,ten_thousand,place; /*分别代表个位,十位,百位,千位,万位和位数*/

printf(\请输入一个整数(0-99999):\ scanf(\ if (num>9999) place=5;

5